There are lots of little additions that I'm liking about OmniFocus 2. As an example, from the change log:

Here's an example of how this can be helpful: I have a number of projects titled "Overview" which are essentially administration type projects that oversee the rest of the projects sitting in a folder. Something like:
- Big Project
- Overview
- Folder A
- Project 1
- Project 2
One of the issues has been that in Review mode, I would have to guess which "Overview" folder I was reviewing. It wasn't a big deal, but it was something. In any case, this feature totally helps out. To turn it on,
- Go to review mode (Command-6) by default.
- Select the view icon (or type Shift-Command-v)
- Select the option "Show Folders in the Outline":
Now we can have a better view of the hierarchy:
